Brand new: lowest price

The lowest-priced, brand-new, unused, unopened, undamaged item in its original packaging (where packaging is applicable).Packaging should be the same as what is found in a retail store, unless the item is handmade or was packaged by the manufacturer in non-retail packaging, such as an unprinted box or plastic bag.See details for additional description.

£5.60

It is an essential tool that is particularly useful when shooting with a shallow depth of field, where focusing should ideally be "spot on". Inspect the photo to see if focusing is accurate. If focusing is accurate, the '0' on the ruler should be the sharpest point on the image and the other numbers get blurrier as you move away from the 0.